Media bay batteries

[natgab]

Anybody have experience with media bay batteries on a T4x? I know it does not last as long, but how much extra time can you get from one?

I have seen some Lenovo batteries on ebay.

[ajkula66]

Anybody have experience with media bay batteries on a T4x? I know it does not last as long, but how much extra time can you get from one?

An hour, maybe 90 minutes when these were brand spanking new.

I have seen some Lenovo batteries on ebay.

With a likely production date of 2007/2008?

[theterminator93]

I've always enjoyed the flexibility of having these available. Unlike main batteries you can swap these one after another to basically extend your battery life as long as you need to without shutting down or going into hibernation. I've got handful of these that hold maybe 45 minutes each anymore... I don't use them terribly often, but they come in handy when I need them.

I bought one new with my T61p. Didn't boost battery life by much when it was new; maybe an hour - tops - but it did absorb all the cycling that would have otherwise accelerated the wear on the main battery.

[natgab]

Anybody have experience with media bay batteries on a T4x? I know it does not last as long, but how much extra time can you get from one?

An hour, maybe 90 minutes when these were brand spanking new.

I have seen some Lenovo batteries on ebay.

With a likely production date of 2007/2008?

--This one is labelled as a Lenovo, not an IBM. Any chance its new?

http://www.ebay.com/itm/Genuine-Ultraba ... 1681258433

[brchan]

That is a bay battery for T60 era and newer thinkpads, not for T43 era machines. It is listed as new, so it should be new. Judging by the seller rating, they are probably not lying. either.

[theterminator93]

Only problem with "new" batteries is that they do wear out, even while sitting on the shelf. I don't ever expect them to hold 100% their original new capacity - IMHO, 85-90% is acceptable for NOS Li-po batteries about 7-8 years of age.

[natgab]

That is a bay battery for T60 era and newer thinkpads, not for T43 era machines. It is listed as new, so it should be new. Judging by the seller rating, they are probably not lying. either.

--Always good to have a 2nd set of eyes on these things!

Only problem with "new" batteries is that they do wear out, even while sitting on the shelf. I don't ever expect them to hold 100% their original new capacity - IMHO, 85-90% is acceptable for NOS Li-po batteries about 7-8 years of age.

--OK, I'll have a look at some of the used ones. Kinda a nostalgia thing, I loved having a media bay battery on my old Apple Pismo (Powerbook G3) long ago.